Watermarking device for paper.



H. BROWN. WATERMARKING DEVICE FOR PAPER. APPLICATION FILED MARHZB, 1911.-

1,014,635, I Patntad Jan.16,1912

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, Specification of Letters ratent. Patented Jan. 16, 1912 Applic tion filed March 28 13 Se ial No. 617,43

Referring to the drawings, a and b are the upper and lower press rolls carried in suitable standards inthe usual manner. On

' To all-whom it may concern;

Be it known that I, HOWARD BRQWN, a

citizen of the United States of America, re-

siding 5 Hampden and State of Massachusetts, have to the paper under pressure and applic at Springfield, in the county of invented new and useful Improrementsin Watermarking Devices for Paper, of wh ch the following is a specification.

.'{This invention relates to paper making 1:0 machines. and particularly to devicesto 11npress on the paper,-dur1ng the process of I manufacture, any desired mark having the general characteristics of the so-called watcr-mark, but differing from the latter in that it is'not applied until after the web of pulp-has taken definite form as a self-sup porting sheet, but' before it reaches the driers.

The object of the invention is to provide 20.1.neans whereby a mark of a relatively intricate design and having relatively fine lines, as compared with the ordinary watermark, may be impressed in the paper by the use ofan ordinary stereotyped plate applied thereto. at such a polnt during thccourse' of its travel throughthe paper machine as will best adapt the sheet to receive suchimprssions, that is-tosay, preferably as the paper so is passing over one of the press-rolls.

' Applicant is aware that, broadly, it is not new to impress a mark upon the paper after it leaves the couch-rolls and beforeit reaches the driers, and this invention consists in certain improvements which will be described and clalmed in the'specification and clearly illustrated in the accompanying drawings, in which,

Figure 1 is an isometric view of one of 40 the presses of the ordinary Fourdrinier paper'making machine having the invention applied thereto in its preferred form. Fig. 2 is a sectional elevation on an enlarged scale showing a portion of the press-roll and showing the constructionand arrangement of the bearing disks. which are applied to each end of the roll which carries the stereotyped PIBtQSye-thfi plane of the section being-on line 2---2,.Fig. 3. Fig. 3 isa front elevation, also on a enlargedscalcpof the stereotyped plate-r0 as viewed from the front of Fig. 1, this view showing means whereby the bearing disks are connected with the shaft of said roll to permit. the adjustment of the disks and permit their rotation as onewith the roll.

end of the roll a is a gear d and in front ing when'the edge of the plates mi, in their rolls have an equal portion of the periph:

eries thereof cut off from each, as indicated by "2), this cut away portion indicating the .whic

Theserolls g and r are rotatably adjust- 1 the retr nsmit-Lun as. adjustment be ing provided by -securmg to the shaft 6 a'-' are secured the rolls k, which, preferably, are made separate, as shown in 'Fig. 1, in-

stead of in one piece, and are non-rotatably secured to the shaft 6 in any suitable way,

i provision being made to secure to the surace of these rolls the stereotyped plates m which are formed on a curve to fit the rolls 7: accurately,the face of the plates being concentridwith said rolls. a

The bearings f, carrying the shaft e, may j be moved by means of the screws 0 toward and from theface ofv the press-rolls a' to bring the plates m into contact with the web d of paper p running over the rolls, and with the requisite degree of-pressure to impress the design on the plates m in the web. As the plates at have to bear against the paper with considerable pressure, and as the contact of these plates is not a continuous one, it is necessary toprovide means whereby said contact shall be, in effect, continuous to v prcventthe shaft e from jumping or. springrotative contact with the web, either comes in contaot'with the paper or runs ofi' therefrom after the impression has been made. To make this contact as nearly continuous as possible, the bearing rolls g and r on one end, and s and t on the opposite end of the -shaft e, are provided and so located that.

they will bear on the face of the roll a, as shown in Figs. 1 and 3 beyond the borders of the paper. As shown in Fig. 2, these two maxinum width of any stereotyped plate 1t 15 desired to use on the rolls 1:.

ablc,--rcne. rclative to the ot.her.-. as. shown, and a'tthe same time are, rotatable as one with the shaft e.- The means for supporting yokefflb shown most clearly in Fig. 3)

ion

in each end of which is a bolt :1; extending through concentric slots 1 in the rolls. These slots y'dn each roll register one with the other when the two surfaces 1: are in parallelism. 011* each bolt w is a suitable of contact" with the press-rolls'a and I) just prior to the time when the front edge of the stereotyped-plate ,m comes in contact with to the rolls k,

the paper on the press-rolls and during the entire period that the plate and paper are in contact. Thus the contact of the roll a with the press-roll will be interrupted just 'beforehthe forward edge of the I plate m touches the paper, and "just as the rear edge-of the plate leaves the paper the rollq comes to a bearing on the press-roll. In this way there is practically no interruption of the continuous rotative contact of the elements on the shafte with thepress-rolls.

It will be observed that the diameter of the bearing-rollsis equal to the diameter of the' rolls kand the plate m plus the thickness of the paper as it runsover the press-rolls aand b.

By means. of the construction of the bearing-rolls, as described, stereotyped plates m of anydesired width may be used from the 'maxium width (which is indicated by the length of the. cut-away portion '0 of the rolls) to one as narrow as could be aflixed The' devices described herein provide means whereby a distinctive mark of a comparatively intricate nature. may be very cheaply and clearly. applied to the paper instead of the ordinary water-mark, it being possible, bythe well known cheap method of producingthese plates, to apply to the paper a most fanciful design which it would be impossible to produce as the ordinary socalled water-mark is produced, and this invention possesses great utility on account of the fact that many large dealers in paper now: require or desire the'mill to provide special marks for the paper made'for them,

which, by the use of the devices herein described, can be done by the mills at a relatively small expense. What I claim, is 1. In a paper machine, a rigid roll having thereon an impression plate whose surface out of contact therewith.

I is concentric with the roll, means to support the borders of the paper, said di'sksbeing out of contact with their supporting surface when said impression plate is 1n contact with the paper.

2. In a paper machine, the combination with a roll having'means for impressing a mark: on the paper, of'bearingdisks on the roll having a portion of theirperipheries broken away, said broken away portion corresponding substantiallysto the widtho f the mark, together-with means to press the roll forcibly against the paper, said disks serv ingto support the roll against said pressure when the means for impressing the paper are 3. The combinationwith the press-roll of a paper machine, of a second roll supported in parallelism therewith','gears on said rolls to rotate them at the same circumferential speed, a' stereotype plate onsaid second roll 4. In a paper machine, a rollhavinga rigid design plate in relief extending beyond the'surface of the roll and partially around -the'rol1 means! to adjust saidroll whereby during its rotation said design plate will come inf'forci'ble periodic 'contactwith the paper, and means" to maintain the position of the roll relative to the surface'of' the paper when. said design plate is out of contact with the paper. 4

4 5. Ina paper machine,the combination with a roll having a rigid design plate thereon whosesurface comes in periodic contact with the paper to impress a mark thereon, of two disks mounted on, and rotating with the roll to bear on an unyielding surface beyond the borders of the paper, said disks having a part of their peripheries broken away, and means to adjust said disks rotatively oiie relative to the other, wherebythe extent of the interrupted peripheral contact of said disks with the surface on which the bear may be made to agree substantially with the width of that portion-0f the design plate which bears on the paper.

Witnesses:

a IPGLEMOKS, HAR'RY W. B

HOWARD BROWN. 

